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On the back side of this 1929 Standard Oil Co. map of "Main Trunk and Highways" of Wisconsin is a "Territorial Road Map featuring Federal System of Highways" for the Midwest, including the 3-year-old Route 66 from Chicago to northeast Oklahoma.

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Here's a view of the eastern part of Route 66 from Chicago west to past the Texas-New Mexico border. This is from a national map on the backside of a "Highway Map North Central Section of the United States" distributed by Standard Oil Company of Indiana with plugs for all its sister companie…

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Of the seven Route 66 roadside parks maintained by the Missouri State Highway Commission in 1956, two were located in Laclede County. The parks were listed on the 1956 Official Missouri Highway Map.